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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-03 01:49:55 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:42 +0100 |
| commit | cc0e1474f1b9fd581ecf73b1ce6ec717d0430d2f (patch) | |
| tree | e6ce33e3ee0471d945c9aca60634124f05e8a95d | |
| parent | 7d4e27ca908d2ac97e7266debd44feb128974a5a (diff) | |
| download | ffmpeg-cc0e1474f1b9fd581ecf73b1ce6ec717d0430d2f.tar.gz | |
avcodec/hnm4video: Optimize postprocess_current_frame()
Improves: Timeout (220sec -> 108sec)
Improves: 15570/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HNM4_VIDEO_fuzzer-5085482213441536
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit cd460f4da04c05d6ba93ccbbe294e948768f0937)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hnm4video.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/libavcodec/hnm4video.c b/libavcodec/hnm4video.c index 95a284065e..177ce1d47a 100644 --- a/libavcodec/hnm4video.c +++ b/libavcodec/hnm4video.c @@ -117,14 +117,17 @@ static void unpack_intraframe(AVCodecContext *avctx, uint8_t *src, static void postprocess_current_frame(AVCodecContext *avctx) { Hnm4VideoContext *hnm = avctx->priv_data; - uint32_t x, y, src_x, src_y; + uint32_t x, y, src_y; + int width = hnm->width; for (y = 0; y < hnm->height; y++) { + uint8_t *dst = hnm->processed + y * width; + const uint8_t *src = hnm->current; src_y = y - (y % 2); - src_x = src_y * hnm->width + (y % 2); - for (x = 0; x < hnm->width; x++) { - hnm->processed[(y * hnm->width) + x] = hnm->current[src_x]; - src_x += 2; + src += src_y * width + (y % 2); + for (x = 0; x < width; x++) { + dst[x] = *src; + src += 2; } } } |